<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>优雅实现轮询请求 | 前端最佳实践</title>
    <link href="https://cdn.staticfile.org/font-awesome/6.4.0/css/all.min.css" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap" rel="stylesheet">
    <link href="https://cdn.staticfile.org/tailwindcss/2.2.19/tailwind.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/mermaid@latest/dist/mermaid.min.js"></script>
    <style>
        body {
            font-family: 'Noto Sans SC', Tahoma, Arial, Roboto, "Droid Sans", "Helvetica Neue", "Droid Sans Fallback", "Heiti SC", "Hiragino Sans GB", Simsun, sans-serif;
            color: #333;
            line-height: 1.8;
        }
        .hero-gradient {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        .code-block {
            background: #2d3748;
            border-radius: 8px;
            color: #e2e8f0;
        }
        .code-block pre {
            margin: 0;
            padding: 1.5rem;
            overflow-x: auto;
        }
        .highlight {
            background: rgba(255, 214, 0, 0.2);
            padding: 0.2em 0.4em;
            border-radius: 4px;
        }
        .card-hover {
            transition: all 0.3s ease;
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }
        .section-divider {
            height: 1px;
            background: linear-gradient(90deg, rgba(200, 200, 200, 0) 0%, rgba(200, 200, 200, 0.5) 50%, rgba(200, 200, 200, 0) 100%);
        }
        .drop-cap::first-letter {
            float: left;
            font-size: 4.5em;
            line-height: 0.85;
            margin-right: 0.1em;
            margin-top: 0.1em;
            font-weight: 700;
            color: #4f46e5;
        }
    </style>
</head>
<body class="bg-gray-50">
    <!-- Hero Section -->
    <section class="hero-gradient text-white py-24 px-4">
        <div class="max-w-5xl mx-auto text-center">
            <h1 class="text-4xl md:text-5xl font-bold mb-6 animate-fade-in-down">优雅实现<span class="bg-white text-indigo-600 px-2 rounded-md">轮询请求</span></h1>
            <p class="text-xl md:text-2xl opacity-90 mb-8 max-w-3xl mx-auto">前端数据实时更新的优雅解决方案</p>
            <div class="flex justify-center space-x-4">
                <button class="bg-white text-indigo-600 px-6 py-3 rounded-full font-medium hover:bg-opacity-90 transition-all transform hover:-translate-y-1">
                    <i class="fas fa-code mr-2"></i>查看示例代码
                </button>
                <button class="border-2 border-white text-white px-6 py-3 rounded-full font-medium hover:bg-white hover:bg-opacity-10 transition-all transform hover:-translate-y-1">
                    <i class="fas fa-book mr-2"></i>学习最佳实践
                </button>
            </div>
        </div>
    </section>

    <!-- Content Container -->
    <div class="max-w-5xl mx-auto px-4 py-12">
        <!-- Intro Section -->
        <section class="mb-20">
            <p class="drop-cap text-gray-700 text-lg leading-relaxed mb-6">你是否遇到过这样的场景：页面上的数据需要实时刷新，但又不想让服务器压力山大？你可能第一时间想到 setInterval，但用着用着就发现，页面卡顿、请求堆积、数据不同步等问题接踵而来。</p>
            
            <div class="my-8 rounded-xl overflow-hidden shadow-lg">
                <img src="https://cdn.nlark.com/yuque/0/2025/png/21449790/1753775868556-811154de-7d7e-41ff-b644-7b84d62d82e6.png" alt="轮询请求示意图" class="w-full h-auto">
            </div>
            
            <p class="text-gray-700 text-lg leading-relaxed">其实，轮询这件小事，背后藏着不少门道。如何让每5秒的请求既稳定又优雅？如何避免"野蛮"轮询带来的各种坑？让你的项目既高效又优雅，轻松应对各种实时数据需求！</p>
        </section>

        <